Toshiba Laptop L855 dead and not charging

8.4.1 Adapter Detect and ACOK Output
The bq24725A uses an ACOK comparator to determine the source of power on VCC pin, either from the battery
or adapter. An external resistor voltage divider attenuates the adapter voltage before it goes to ACDET. The
adapter detect threshold should typically be programmed to a value greater than the maximum battery voltage,
but lower than the maximum allowed adapter voltage.
The open drain ACOK output requires external pull up resistor to system digital rail for a high level. It can be
pulled to external rail under the following conditions:
• VVCC > UVLO;
• 2.4V < V_ACDET < 3.15V (not in ACOVP condition, nor in low input voltage condition);
• VVCC–VSRN > 275mV (not in sleep mode);

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pplus said:

ACDET is low - 1.24V

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